Production is clearly in full swing on the Italian set of Avengers: Age of Ultron with a massive action piece lensing today. We've got a set of photos from the production, showing off a battle that includes Jeremy Renner's Hawkeye, Elizabeth Olsen's Scarlet Witch, Aaron Taylor-Johnson's Quicksilver and, it appears, even Ultron himself (along with a number of mysterious motion capture actors, too)! Check out all the images in the gallery viewer below!